Saving Data on Android

model
 package and name it 
Answer
.
Once again, fill or replace the file content with the following code:
@Entity(tableName = "answers")
 
data
 
class
 
Answer
( 
    
@PrimaryKey(autoGenerate = true)
 
    
@ColumnInfo(name = "answer_id")
 
    
val
 answerId: 
Int
, 
    
@ColumnInfo(name = "question_id")
Saving Data on Android
Chapter 6: Entity Definitions
raywenderlich.com
114

---

    
val
 questionId: 
Int
, 
    
@ColumnInfo(name = "is_correct")
 
    
val
 isCorrect: 
Boolean
, 
    
val
 text: String 
)
The code is very similar to the 
Question
 class, so there is not much need to explain 
the steps. With this, your entities are ready, and it is time to create your database!
Create a new package under the data directory and name it 
db
.
Now, create a new class under the 
db
 package and name it 
QuizDatabase
. Replace 
everything inside with the following:
@Database(entities = [(Question::class)
, (Answer::
class
)], 
version = 1)
 
abstract
 
class
 
QuizDatabase
 : 
RoomDatabase
()
Similar to your entities, Room uses the 
@Database
 annotation to define which class 
should be used to generate your database tables, connections and queries.
The 
@Database
 annotation should always include at least two properties:
•
entities
: These should include an array of all the the entities associated with 
your database.
•
version
: This is the current version of your database, which is used to migrate 
everything once things change.
Note
: It is very important that you declare your class as an abstract class that 
extends from 
RoomDatabase
 or Room will throw an error.
There are many ways to get an instance of your database at runtime, but, for this 
app, you will create a property inside your 
Application
 class.
Create a new class under the root package of your project —